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boulder clay

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boulder clay

an unstratified glacial deposit consisting of fine clay, boulders, and pebbles
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

boulder clay

[′bōl·dər ‚klā]
(geology)
till
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

till, glacial till, boulder clay

An unstratified glacial deposit which consists of pockets of clay, gravel, sand, silt, and boulders; has not been subject to the sorting action of water; usually has good load-sustaining properties.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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References in periodicals archive
The boulder clay is overlain by unconsolidated grey clay, generally overlain by a thinner, yellow clay, which thins to the southwest.
Geology of the Parliament Buildings 5: Geology of the Manitoba Legislative Building
Det Con Orr said that reports by the Humber Archeological Partnership and the Geography Department at Hull university suggested the relic "could not physically have been incorporated in the boulder clay at Aldbrough".
Treasure riddle over Anglo Saxon sword
Investigative work has revealed that erosion is being caused by a combination of the river at the base of the cliff and water and frost action on the boulder clay at the top.
Digging for information; Cemetery will be excavated before time runs out
the tillite might well have been boulder clay by the shore of a Canadian river....
Frozen in time: concepts of 'global glaciation' from 1837 (die Eiszeit) to 1998 (the Snowball Earth)
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